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The potential energy analysis of biomass waste as a sustainable source of energy continues to increase with various design to obtain maximum efficiency. Modification of the type of material, diameter, and length of the connecting tube between the reactor and the condenser can increase its effectiveness. The optimal parameter search for the connecting tube that produces liquid-smoke are carried out using galvanized pipes and stainless-steel pipes with variations in diameter ¼ inch, ¾ inch, and length 1 meter, 0.5 meters. Testing the quantity of liquid-smoke results on sugar palm waste samples was carried out at 400 C for 60 minutes by seeing an increase of the amount of liquid-smoke. The results of the study show variations in size and type of tube affect the product yield of the pyrolysis process. Stainless-steel pipes have better performance to produce liquid-smoke. The shorter the length of the pipe increases the quantity of liquid-smoke, but the smaller the diameter of the pipe decreases the quantity of liquid-smoke. This paper discusses in more detail the comparison of the performance of connecting tube by modifying the type of material, the length, and the diameter of the pipe.